<template>
  <div class="login_container">
    <el-row>
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <el-form
          class="login_form"
          :model="loginForm"
          :rules="rules"
          ref="loginForms"
        >
          <h1>Hello</h1>
          <h2>欢迎来到硅谷甄选</h2>
          <el-form-item prop="username">
            <el-input
              :prefix-icon="User"
              v-model="loginForm.username"
            ></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input
              type="password"
              :prefix-icon="Lock"
              v-model="loginForm.password"
              show-password
            ></el-input>
          </el-form-item>
          <el-form-item>
            <el-button
              :loading="loading"
              class="login_btn"
              type="primary"
              size="default"
              @click="login"
            >
              登录
            </el-button>
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
  </div>
</template>

<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue'
import { reactive, ref } from 'vue'
//引入用户相关的小仓库
import useUserStore from '@/store/modules/user'
//引入路由器 路由
import { useRouter, useRoute } from 'vue-router'
//引入消息提示
import { ElNotification } from 'element-plus'
//引入获取当前时间的函数
import { getTime } from '@/utils/time'

//账号和密码
let loginForm = reactive({ username: 'admin', password: '111111' })
//用户小仓库
let userStore = useUserStore()
//路由器
let $router = useRouter()
//路由
let $route = useRoute()
//控制按钮加载效果的响应式数据
let loading = ref(false)
//获取el-form组件
let loginForms = ref()

//点击登录的回调
const login = async () => {
  //确保所有的表单项校验通过才能向下执行
  await loginForms.value.validate()
  //加载效果
  loading.value = true
  //通知仓库发送登录请求
  try {
    //通知仓库发送登录请求（返回一个成功或失败的promise对象）
    await userStore.userLogin(loginForm)
    //登陆成功:根据有无query参数跳转不同页面
    let redirect: any = $route.query.redirect
    if (redirect) {
      $router.push({
        path: redirect,
      })
    } else {
      $router.push({
        path: '/',
      })
    }
    //登录成功加载效果消失
    loading.value = false
    //登陆成功提示信息
    ElNotification({
      type: 'success',
      message: '欢迎回来！',
      title: `HI,${getTime()}好~`,
    })
  } catch (error) {
    //登录失败加载效果消失
    loading.value = false
    //登录失败提示信息
    ElNotification({
      type: 'error',
      message: (error as any).message,
    })
  }
}
//自定义校验表单配置对象的配置函数
//@ts-ignore
const validatorUserName = (rule: any, value: any, callback: any) => {
  if (value.length >= 5) {
    callback()
  } else {
    callback(new Error('账号长度至少为5位'))
  }
}
//@ts-ignore
const validatorPassword = (rule: any, value: any, callback: any) => {
  if (value.length >= 6) {
    callback()
  } else {
    callback(new Error('密码长度至少为6位'))
  }
}
//自定义校验表单配置对象
const rules = {
  username: [{ trigger: 'change', validator: validatorUserName }],
  password: [{ trigger: 'change', validator: validatorPassword }],
}
</script>

<style scoped lang="scss">
.login_container {
  width: 100%;
  height: 100vh;
  background: url('@/assets/images/background.jpg') no-repeat;
  background-size: cover;

  .login_form {
    position: relative;
    width: 80%;
    top: 20vh;
    background: url('@/assets/images/login_form.png') no-repeat;
    background-size: cover;
    padding: 40px;

    h1 {
      color: white;
      font-style: 40px;
    }

    h2 {
      color: white;
      font-size: 20px;
      margin: 20px 0;
    }

    .login_btn {
      width: 100%;
    }
  }
}
</style>
